package online.misscl.hello.util;

import online.misscl.hello.util.CodeUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.util.Random;


/**
 * project name: IntelliJ IDEA
 * Date: 2022/9/26 23:02
 *
 * @PackageName: online.misscl.hello.service
 * @ClassName: CodeUtil
 * @Author: Theo
 * @Version:
 * @Description:
 */
public class CodeUtil {

    public static final String RANDOMCODEKEY= UUIDUtil.getUUID();//放到session中的key
    private static String randString = "0123456789";//随机产生只有数字的字符串 private String
    //private String randString = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";//随机产生只有字母的字符串
    //private String randString = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";//随机产生数字与字母组合的字符串


    private static final Logger logger =  LoggerFactory.getLogger(CodeUtil.class);

    private static Random random = new Random();

    /**
     * 获得字体
     */
    public static Font getFont() {
        return new Font("Fixedsys", Font.CENTER_BASELINE, 18);
    }

    /**
     * 获得颜色
     */
    public static Color getRandColor(int fc, int bc) {
        if (fc > 255)
            fc = 255;
        if (bc > 255)
            bc = 255;
        int r = fc + random.nextInt(bc - fc - 16);
        int g = fc + random.nextInt(bc - fc - 14);
        int b = fc + random.nextInt(bc - fc - 18);
        return new Color(r, g, b);
    }


    /**
     * 绘制字符串
     */
    public static String drowString(Graphics g, String randomString, int i) {
        g.setFont(getFont());
        g.setColor(new Color(random.nextInt(101), random.nextInt(111), random
                .nextInt(121)));
        String rand = String.valueOf(getRandomString(random.nextInt(randString
                .length())));
        randomString += rand;
        g.translate(random.nextInt(3), random.nextInt(3));
        g.drawString(rand, 13 * i, 16);
        return randomString;
    }

    /**
     * 绘制干扰线
     */
    public static void drowLine(Graphics g) {
        int x = random.nextInt(95);
        int y = random.nextInt(25);
        int xl = random.nextInt(13);
        int yl = random.nextInt(15);
        g.drawLine(x, y, x + xl, y + yl);
    }

    /**
     * 获取随机的字符
     */
    public static String getRandomString(int num) {
        return String.valueOf(randString.charAt(num));
    }
}